Add support for updating your gulpfile

You can now run `yo jekyllized:gulp --rsync` to update your gulpfile and
package.json to the latest version of both with Rsync for uploading.
Neat.

README.md

@@ -59,6 +59,13 @@ new/updated site is uploaded to your platform of choice.
     in
 * **Start:** Run `gulp` and watch the magic unfold
 
+#### Update
+It's recommended that you keep your `gulpfile` up to date with the generator.
+First, update `generator-jekyllized`: `npm update generator-jekyllized -g` and
+then run `yo jekyllized:gulp [--rsync|amazon|pages]`, or see the help: `yo
+jekyllized:gulp --help`. Note that this will overwrite any local changes you've
+made, so make sure to make a backup.
+
 ## Usage
 
 #### `gulp [--prod]`

generators/boilerplate/templates/README.md

@@ -28,9 +28,9 @@ If you have cloned this repo or want to reinstall, make sure there's no
 `bundle install`.
 
 #### Update
-To update: `npm update generator-jekyllized -g`, then run `yo jekyllized:gulp`
-in this directory. Note that this will overwrite any local changes, so back it
-up.
+To update: `npm update generator-jekyllized -g`, then run `yo jekyllized:gulp
+[--rsync|amazon|pages]` in this directory. Note that this will overwrite any
+local changes, so back it up.
 
 ## Github
 For more information on how to use your new project, please refer to the [README

generators/gulp/USAGE

@@ -0,0 +1,12 @@
+Updating:
+  When updating your gulpfile and packages you need to include a command line
+  flag specifying how you want to upload your site, if no flag is specified it
+  will generate a gulpfile without any uploading task. For example:
+
+    yo jekyllized:gulp
+    yo jekyllized:gulp --rsync
+
+  Options:
+    --amazon
+    --rsync
+    --pages

generators/gulp/index.js

@@ -2,6 +2,7 @@
 
 var _ = require('lodash');
 var generators = require('yeoman-generator');
+var argv = require('yargs').argv;
 
 module.exports = generators.Base.extend({
   constructor: function () {
@@ -14,6 +15,18 @@ module.exports = generators.Base.extend({
       message: 'How do you want to upload your site?',
       choices: ['Amazon S3', 'Rsync', 'Github Pages', 'None']
     });
+
+    if (argv.amazon) {
+      this.options.uploading = 'Amazon S3';
+    }
+
+    if (argv.rsync) {
+      this.options.uploading = 'Rsync';
+    }
+
+    if (argv.pages) {
+      this.options.uploading = 'Github Pages';
+    }
   },
 
   writing: {

package.json

@@ -47,6 +47,7 @@
     "istanbul": "^0.4.2",
     "mocha": "^2.4.5",
     "mocha-lcov-reporter": "^1.2.0",
+    "yargs": "^4.6.0",
     "yeoman-assert": "^2.1.1",
     "yeoman-test": "^1.1.0",
     "yo": "^1.7.0"